[U-Boot] [PATCH v6 00/18] GPT over MTD

[Patrick DELAUNAY]

Hi Maxime,

> From: Maxime Ripard [mailto:maxime.ripard at free-electrons.com]
> Sent: jeudi 11 mai 2017 10:20
> 
> Hi,
> 
> On Thu, May 11, 2017 at 09:51:50AM +0200, Patrick Delaunay wrote:
> > I have a request to support GPT over MTD to have the MTD informations
> > without U-Boot environment(CONFIG_ENV_IS_NOWHERE is a other
> > requirement of my project to manage several board configuration with
> > the same defconfig; boot from NAND or NOR or SDCARD).
> 
> What would happen if you have a bad block in the middle of the primary or
> secondary GPT headers (or both)?
> 
> Maxime
> 

All Bad block are skipped....
=> primary GPT header is located at the beginning of first good block
=> backup GPT header is located at the end the of last good block

And gpt create will failed if the erase block command (for primary or backup GPT) 
produce a new bad block.

I try to explain this behavior in the added file doc/README.gpt.mtd 
with the patch

[PATCH v6 07/18] disk: part: add support of GPT partitioning over MTD

regards

Patrick